Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax [Abstract]
Income tax expense	$ 3,683	$ 4,777	$ 11,454	$ 9,245
(Decrease) increase in income tax expense	(3)	$ 6	(168)	$ (191)
Gross unrecognized tax benefits	$ 200		$ 200		$ 200